public class Log
	{
		private static StreamWriter w;

		static  Log()
		{
			HttpContext context = HttpContext.Current;
			w = new StreamWriter( new FileStream( context.Request.MapPath("~/Log/logfile.log"), FileMode.OpenOrCreate, FileAccess.Write ), Encoding.GetEncoding("windows-1251"));
			w.AutoFlush = true;
		}

		public static void WriteToLog( string s ) 
		{
			string logstr = String.Format("{0} {1} {2}", DateTime.Now.ToString(), HttpContext.Current.Request.UserHostAddress, s );
			if ( w != null) 
			{
				w.WriteLine( logstr ); 
			}
		}

		public static void Close() 
		{
			if (w != null)
				w.Close();
		}
	}